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US10658784B2 - Crimp terminal - Google Patents

Crimp terminal Download PDF

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Publication number
US10658784B2
US10658784B2 US16/423,845 US201916423845A US10658784B2 US 10658784 B2 US10658784 B2 US 10658784B2 US 201916423845 A US201916423845 A US 201916423845A US 10658784 B2 US10658784 B2 US 10658784B2
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Prior art keywords
region
seal
barrel
seal member
seal portion
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Application number
US16/423,845
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English (en)
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US20190280422A1 (en
Inventor
Kei Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
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Yazaki Corp
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Assigned to YAZAKI CORPORATION reassignment YAZAKI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SATO, KEI
Publication of US20190280422A1 publication Critical patent/US20190280422A1/en
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Publication of US10658784B2 publication Critical patent/US10658784B2/en
Assigned to YAZAKI CORPORATION reassignment YAZAKI CORPORATION CHANGE OF ADDRESS Assignors: YAZAKI CORPORATION
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5216—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases characterised by the sealing material, e.g. gels or resins

Definitions

  • the present invention relates to a crimp terminal configured to be crimp-connected to a covered electric wire having an aluminum core wire.
  • a covered electric wire having an aluminum core wire has been used for a wire harness in place of a covered electric wire having a copper core wire.
  • Some crimp terminals such as connector terminals, for example, are made of a copper alloy or the like and having a surface that is tin-plated or gold-plated.
  • the crimp terminal of this type is crimped to an end portion of the covered electric wire where the aluminum core wire is exposed, contact between dissimilar metals occurs between the aluminum core wire and a crimping barrel portion of the crimp terminal. If moisture adheres to such contact portion, the aluminum core wire made of aluminum which is a base metal could be corroded due to so-called dissimilar metal corrosion.
  • FIG. 29 shows an example of a conventional crimp terminal having a seal member arranged to surround a contact portion between a barrel portion and an aluminum core wire.
  • a crimp terminal 9 shown in FIG. 29 includes a barrel portion 91 and a terminal portion 92 arranged in a predetermined axial direction D 91 .
  • the barrel portion 91 and the terminal portion 92 are produced from a metal plate made of a copper alloy or the like using sheet-metal processing and have a surface that is subjected to tin plating or gold plating.
  • the barrel portion 91 is a portion that is wound around and crimped to an end portion W 9 a of a covered electric wire W 9 having an aluminum core wire W 91 , where the aluminum core wire W 91 is exposed.
  • the terminal portion 92 is a female terminal configured to be connected to a pin terminal (not shown) as an object to be connected.
  • the barrel portion 91 is configured by bending the metal plate so that a cross section thereof intersecting with the axial direction D 91 has a substantially U-like shape. After the end portion W 9 a of the covered electric wire W 9 is placed on an inner surface 911 of the barrel portion 91 , the barrel portion 91 is wound around and crimped to the end portion W 9 a . A part of the inner surface 911 of the barrel portion 91 serves as a contact portion 911 a with the aluminum core wire W 91 at the end portion W 9 a.
  • the contact portion 911 a is provided with a serration 94 having a plurality of grooves arranged in rows in the axial direction D 91 , each groove extending in an intersecting direction D 92 that intersects with the axial direction D 91 in a plan view with respect to the contact portion 911 a .
  • a seal member 93 is provided so as to surround the contact portion 911 a .
  • the sealing member 93 seals gaps at the respective locations around the contact portion 911 a and prevents moisture from entering.
  • Patent Document 1 JP 5480368 B
  • Patent Document 2 JP 5940198 B
  • the above-described conventional crimp terminal as shown as one example in FIG. 29 has a problem that the seal member 93 provided to the barrel portion 91 may be a hindrance to the winding and crimping of the barrel portion 91 to the end portion W 9 a.
  • an object of the present invention is to provide a crimp terminal that can reduce a difficulty of manufacturing while providing waterproof property with respect to a contact portion with aluminum core wire.
  • the present invention provides a crimp terminal including a barrel portion configured to be wound around and crimped to an end portion of a covered electric wire having an aluminum core wire at which the aluminum core wire is exposed, and a terminal portion configured to be connected to a connection object, wherein the barrel portion and the terminal portion are arranged in a predetermined axial direction, wherein the barrel portion includes a bottom plate which extends in the axial direction and on which the end portion of the covered electric wire is to be placed, and an inner barrel piece and an outer barrel piece which extend from the bottom plate on both sides in an intersecting direction intersecting with the axial direction in a plan view with respect to the bottom plate, wherein the barrel portion is configured to be wound around the end portion, during crimping, with the inner barrel piece arranged inside, wherein an inner surface of the barrel portion is provided with a plurality of recesses arranged dispersedly, and a groove, wherein, of a first region traversing the outer barrel piece in the axial direction, a
  • the crimp terminal of the present invention edges of the respective recesses provided on the inner surface of the barrel portion dig into the aluminum core wire by the crimping, thereby providing good continuity between the covered electric wire and the crimp terminal. Furthermore, the crimp terminal of the present invention includes the seal member formed from adhesive gel and attached on the inner surface of the barrel portion, and the seal member seals, after the crimping, a space between the inner barrel piece and the outer barrel piece, the opening of the barrel portion formed cylindrical located on a side of the terminal portion, and a space between the covered portion and the barrel portion.
  • the portion of the seal member to be attached to the second region is formed into a strip-like shape having a width that allows a part of said portion to be pushed out from the opening after the crimping
  • the portion of the seal member to be attached to the first region is formed into a shape corresponding to the groove and having a narrower width than said portion of the seal member to be attached to the second region.
  • the portion of the seal member to be attached to the first region is formed into a shape corresponding to the groove and having a narrower width than said portion of the seal member to be attached to the second region, the amount of the portion of the seal member to be attached to the first region is minimized. Consequently, the hindrance by the seal member during the crimping in which the winding and the crimping are performed with the inner barrel piece arranged inside, can be suppressed. Consequently, according to the crimp terminal of the present invention, difficulty of manufacturing can be reduced while securely providing waterproof property with respect to the contact portion with the aluminum core wire.
  • the groove is also provided in the third region so as to extend in the intersecting direction.
  • the groove provided in the third region serves to prevent displacement during the crimping of the portion of the seal member attached to the third region. Consequently, difficulty of manufacturing can be reduced even more.
  • a portion of the seal member to be attached to the third region is also formed into a shape corresponding to the groove and having a narrower width than said portion of the seal member to be attached to the second region.
  • the amount of the portion to be attached to the third region can be minimized. Consequently, difficulty of manufacturing can be reduced even more.
  • a plurality of the grooves is extending in rows in the axial direction.
  • the grooves are provided in rows in the axial direction in the third region intersecting with the covered portion that is likely to move and likely to be applied with force during the crimping. Consequently, displacement of the portion attached to this third region can be further prevented, thereby further reducing difficulty of manufacturing.
  • the crimp terminal that can reduce a difficulty of manufacturing while providing waterproof property with respect to the contact portion with aluminum core wire, can be provided.
  • FIG. 1 illustrates a crimp terminal according to a first embodiment of the present invention
  • FIG. 2 illustrates how a seal member shown in FIG. 1 is attached to an inner surface of a barrel portion
  • FIG. 3 illustrates a procedure for completing preparation of the crimp terminal shown in FIGS. 1 and 2 that is ready to be crimped to an end portion of a covered electric wire using a terminal connecting method
  • FIG. 4 illustrates a procedure, that follows the procedure shown in FIG. 3 , for crimping the crimp terminal to the end portion of the covered electric wire;
  • FIG. 5 illustrates a placing step shown in FIG. 4 in a plan view with respect to the inner surface of the barrel portion
  • FIG. 6 shows an electric wire with terminal after the crimping that is also shown in FIG. 4 ;
  • FIG. 7 shows changes during a crimping step in a cross section taken along line V 11 -V 11 , a cross section taken along line V 12 -V 12 , and a cross section taken along line V 13 -V 13 in FIG. 6 ;
  • FIG. 8 is a schematic view showing how a gap between a second seal portion and a first seal portion and a gap between a third seal portion and the first seal portion shown in FIG. 2 are closed by elongation of the seal member during the crimping;
  • FIG. 9 is a side view of the electric wire with terminal shown in FIG. 6 viewed from a direction indicated with an arrow V 15 in FIG. 6 ;
  • FIG. 10 is a cross sectional view taken along line V 14 -V 14 shown in FIG. 6 ;
  • FIG. 11 shows a first modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 12 shows a second modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 13 shows a third modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 14 shows a fourth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 15 shows a fifth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 16 shows a sixth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 17 shows a seventh modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 18 shows an eighth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 19 shows a ninth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 20 shows a tenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 21 shows an eleventh modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 22 shows a twelfth modification with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 23 shows a thirteenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 24 shows a fourteenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 25 shows a fifteenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 26 shows a sixteenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 27 shows a seventeenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 28 shows an eighteenth modified example with respect to the embodiment shown in FIGS. 1-10 ;
  • FIG. 29 shows an example of a conventional crimp terminal in which a contact portion between a barrel portion and an aluminum core wire is surrounded by a seal member.
  • FIG. 1 illustrates a crimp terminal according to the first embodiment of the present invention.
  • a crimp terminal 1 is configured to be crimped to an end portion W 1 a of a covered electric wire W 1 having an aluminum core wire W 11 , at which the aluminum core wire W 11 is exposed.
  • the crimp terminal 1 includes a barrel portion 11 , a terminal portion 12 and a seal member 14 .
  • FIG. 1 two crimp terminals 1 are shown, of which one crimp terminal 1 is shown with the seal member 14 removed for the purpose of providing a view of shape of an inner surface of the barrel portion 11 .
  • the barrel portion 11 and the terminal portion 12 are produced from a metal plate made of a copper alloy or the like using punching and sheet-metal processing, and a surface thereof is tin-plated or gold-plated.
  • the barrel portion 11 and the terminal portion 12 are arranged in a predetermined axial direction D 11 .
  • the barrel portions 11 and the terminal portions 12 are collectively formed in a state that a plurality of crimp terminals 1 is connected to each other by a strip-like connecting piece 1 a .
  • the barrel portion 11 is a plate-like portion that is to be wound around and crimped to the end portion W 1 a of the covered electric wire W 1 so as to circumferentially wrap the aluminum core wire W 11 and a covered portion W 12 .
  • this barrel portion 11 is a core wire-cover integrated barrel in which a portion for wrapping the aluminum core wire W 11 and a portion for wrapping the covered portion W 12 are integrally formed.
  • the terminal portion 12 is a quadrangular tube-shaped female terminal configured to be connected to a pin terminal (not shown) as an object to be connected.
  • the barrel portion 11 includes a bottom plate 111 , an inner barrel piece 112 and an outer barrel piece 113 .
  • the bottom plate 111 extends in the above-described axial direction D 11 .
  • the inner barrel piece 112 and the outer barrel piece 113 extend from the bottom plate 111 on both sides in an intersecting direction D 12 intersecting the axial direction D 11 in a plan view with respect to the bottom plate 111 .
  • the barrel portion 11 When being crimped to the end portion W 1 a of the covered electric wire W 1 , the barrel portion 11 is wound around the end portion W 1 a such that the inner barrel piece 112 is arranged inside and the outer barrel piece 113 is arranged outside, as described later.
  • a plurality of recesses 114 is dispersedly provided on an inner surface 11 a of the barrel portion 11 .
  • Each recess 114 is formed into a circular shape in a plan view with respect to the inner surface 11 a of the barrel portion 11 .
  • a protrusion 115 is formed on the bottom plate 111 of the barrel portion 11 at a position where the aluminum core wire W 11 at the end portion W 1 a of the covered electric wire W 1 is placed, and is formed by pressing applied from an outer surface side. Some of the plurality of recesses 114 are also formed on this protrusion 115 .
  • a seal member 14 formed of an adhesive gel sheet is attached to the inner surface 11 a of the barrel portion 11 so as to surround the plurality of recesses 114 from three sides in a plan view.
  • the seal member 14 is attached as described below.
  • examples of the adhesive gel sheet may include, but not limited to, those using acrylic adhesives.
  • FIG. 2 illustrates how the seal member shown in FIG. 1 is attached to the inner surface of the barrel portion.
  • the seal member 14 is formed of an adhesive gel sheet and is arranged over three regions on the inner surface 11 a of the barrel portion 11 , namely a first region 11 a - 1 , a second region 11 a - 2 and a third region 11 a - 3 .
  • the first region 11 a - 1 is a region that traverses the outer barrel piece 113 in the axial direction D 11 .
  • the second region 11 a - 2 is a region that traverses the inner surface 11 a in the intersecting direction D 12 on a side closer to the terminal portion 12 .
  • the third region 11 a - 3 is a region that traverses the inner surface 11 a in the intersecting direction D 12 so as to intersect with the covered portion W 12 of the end portion W 1 a.
  • the seal member 14 is composed of three portions, namely, a first seal portion 141 , a second seal portion 142 and a third seal portion 143 .
  • the first seal portion 141 extends in a strip-like shape in the axial direction D 11 in the first region 11 a - 1 .
  • the second seal portion 142 extends in a strip-like shape in the intersecting direction D 12 in the second region 11 a - 2 .
  • the third seal portion 143 extends in a strip-like shape in the intersecting direction D 12 in the third region 11 a - 3 .
  • a groove 116 is formed in the first region 11 a - 1 , the second region 11 a - 2 and the third region 11 a - 3 , so as to overlap with the seal member 14 .
  • one groove 116 extends in the axial direction D 11 while bending in a sawtooth shape in the partway.
  • one groove 116 extends linearly in the intersecting direction D 12
  • three grooves 116 extend linearly in the intersecting direction D 12 and are joined on a side of the first region 11 a - 1 .
  • the plurality of recesses 114 is provided so as not to be located in the groove 116 .
  • the inner surface 11 a of the barrel portion 11 is provided with a first indent 117 a as a projection extending in the intersecting direction D 12 and arranged at a location closer to a central portion of the barrel portion 11 than the third region 11 a - 3 in a plan view. Furthermore, there is provided a second indent 117 b as a projection extending in the intersecting direction D 12 and arranged at a location partially overlapping the second region 11 a - 2 and closer to the terminal portion 12 than the groove 116 .
  • the seal member 14 is attached in a divided manner that the seal member 14 is divided in the partway of a path 11 a - 4 extending from the second region 11 a - 2 through the first region 11 a - 1 to the third region 11 a - 3 .
  • the seal member 14 is attached in a manner that both of the second seal portion 142 and the third seal portion 143 are divided from the first seal portion 141 .
  • the second seal portion 142 is attached so as to traverse the path 11 a - 4 in the axial direction D 11 and in a manner divided from the first seal portion 141 .
  • the third seal portion 143 is attached so as to traverse the path 11 a - 4 in the intersecting direction D 12 and in a manner divided from the first seal portion 141 .
  • a slight gap G 11 is formed between the second seal portion 142 and the first seal portion 141
  • a slight gap G 12 is formed between the third seal portion 143 and the first seal portion 141 .
  • the second seal portion 142 that is to be attached to the second region 11 a - 2 is formed into a strip-like shape having a wide width designed to allow a part of the second seal portion 142 to be pushed out from an opening of the barrel portion 11 that is formed into a tubular shape after the crimping.
  • the first seal portion 141 that is to be attached to the first region 11 a - 1 has a width narrower than the second seal portion 142 , and is formed into a shape corresponding to the groove 116 in the first region 11 a - 1 .
  • the first seal portion 141 is formed to have substantially the same width and substantially the same shape as the groove 116 so it can be received in the groove 116 .
  • the third seal portion 143 that is to be attached to the third region 11 a - 3 is formed into a strip-like shape having a width slightly wider than that of the second seal portion 142 .
  • the first seal portion 141 , the second seal portion 142 and the third seal portion 143 are attached so as to overlap the grooves 116 of the first region 11 a - 1 , the second region 11 a - 2 and the third region 11 a - 3 , respectively. Especially, the first seal portion 141 is attached so as to be received in the groove 116 , as described above.
  • the crimp terminal 1 described above is manufactured as follows.
  • a sheet-metal processing step for forming a structural object prior to the attachment of the seal member 14 is performed.
  • the barrel portion 11 is formed together with the terminal portion 12 from the metal plate.
  • the barrel portion 11 and the terminal portion 12 are collectively formed with the plurality of crimp terminals 1 connected together by the strip-like connecting piece 1 a .
  • the formation of the plurality of recesses 114 , the formation of the protrusion 115 and the formation of the grooves 116 on the inner surface 11 a of the barrel portion 11 are also performed.
  • a seal member attaching step is performed in which the seal member 14 is formed from an adhesive gel sheet, and the seal member 14 is attached over the first region 11 a - 1 , the second region 11 a - 2 and the third region 11 a - 3 .
  • This seal member attaching step is a step for attaching the seal member 14 in a manner that the seal member 14 is divided in the partway of the path 11 a - 4 extending from the second region 11 a - 2 through the first region 11 a - 1 to the third region 11 a - 3 .
  • the first seal portion 141 , the second seal portion 142 and the third seal portion 143 are individually attached to the inner surface 11 a of the barrel portion 11 .
  • the first seal portion 141 , the second seal portion 142 and the third seal portion 143 are punched out from the adhesive gel sheet and attached to the inner surface 11 a of the barrel portion 11 .
  • the punching out and the attaching are performed at approximately the same time.
  • the second seal portion 142 is attached so as to overlap a part of the second indent 117 b
  • the third seal portion 143 is attached such that the first indent 117 a is exposed.
  • the crimp terminal 1 manufactured as described above is crimped to the end portion W 1 a of the covered electric wire W 1 using a terminal connecting method described below.
  • FIG. 3 illustrates a procedure for completing preparation of the crimp terminal shown in FIGS. 1 and 2 that is ready to be crimped to the end portion of the covered electric wire using the terminal connecting method
  • FIG. 4 illustrates a procedure, that follows the procedure shown in FIG. 3 , for crimping the crimp terminal to the end portion of the covered electric wire.
  • FIG. 3 also shows the sheet-metal processing step (S 11 ) and the seal member attaching step (S 12 ) in the terminal manufacturing method described above.
  • the barrel portion 11 and the terminal portion 12 are formed in the sheet-metal processing step (S 11 ), and the first seal portion 141 , the second seal portion 142 and the third seal portion 143 constituting the seal member 14 are attached in the seal member attaching step (S 12 ).
  • the crimp terminal 1 to be crimped is detached from the connecting piece 1 a shown in FIG. 1 . Then, bending deformation is performed with respect to the barrel portion 11 of that crimp terminal 1 as preparation for placing the end portion W 1 a of the covered electric wire W 1 (S 13 ). This bending deformation is performed such that the inner barrel piece 112 and the outer barrel piece 113 are brought close to each other so that the cross section intersecting with the axial direction D 11 is formed into a substantially U-like shape.
  • a placing step for placing the end portion W 1 a of the covered electric wire W 1 on the inner surface 11 a of the barrel portion 11 after subjected to the bending deformation is performed (S 14 ), as described below.
  • FIG. 5 illustrates a placing step shown in FIG. 4 in a plan view with respect to the inner surface of the barrel portion.
  • the barrel portion 11 that is shown in FIG. 4 in the bent shape is shown in a state of being extended along a plane, in order to provide a clear view of the positional relationship of the end portion W 1 a of the covered electric wire W 1 and the respective portions of the inner surface 11 a of the barrel portion 11 .
  • the end portion W 1 a is placed on the inner surface 11 a of the barrel portion 11 along the axial direction D 11 , such that a tip W 11 a of the aluminum core wire W 11 at the end portion W 1 a overlaps the second seal portion 142 of the seal member 14 . Furthermore, in this placing step (S 14 ), the end portion W 1 a is placed on the inner surface 11 a of the barrel portion 11 such that a tip W 12 a of the covered portion W 12 overlaps the third seal portion 143 of the seal member 14 . Furthermore, in this placing step (S 14 ), the exposed portion of the aluminum core wire W 11 is placed so as to contact with the first indent 117 a.
  • a crimping step for winding around and crimping the barrel portion 11 to the end portion W 1 a such that the outer barrel piece 113 is overlapped on the inner barrel piece 112 with the inner barrel piece 112 arranged inside as shown in FIG. 4 is performed (S 15 ).
  • This crimping step (S 15 ) provides a finished electric wire with terminal TW 1 in which the crimp terminal 1 is connected to the covered electric wire W 1 .
  • the seal member 14 seals the respective portions of the crimp terminal 1 as explained below to form the electric wire with terminal TW 1 .
  • FIG. 6 shows the electric wire with terminal after the crimping that is also shown in FIG. 4 .
  • FIG. 7 shows changes during the crimping step in a cross section taken along line V 11 -V 11 , a cross section taken along line V 12 -V 12 , and a cross section taken along line V 13 -V 13 in FIG. 6 .
  • the first step (S 151 ) of the crimping step bending of the inner barrel piece 112 and the outer barrel piece 113 is started such that the inner barrel piece 112 and the outer barrel piece 113 are wound around the aluminum core wire W 11 on the protrusion 115 and around the covered portion W 12 in the vicinity thereof.
  • the positional relationship is such that, the first seal portion 141 is in contact with the aluminum core wire W 11 , the third seal portion 143 is in contact with the covered portion W 12 , and most part of the second seal portion 142 is substantially not in contact with any of the aluminum core wire W 11 and the covered portion W 12 .
  • the barrel portion 11 is formed into a tubular shape. Then, the first seal portion 141 is sandwiched between the inner barrel piece 112 and the outer barrel piece 113 , and the third seal portion 143 is elongated while being sandwiched between the covered portion W 12 and the barrel portion 11 .
  • the first seal portion 141 is formed with a width and a shape corresponding to the groove 116 , the amount of the seal member 14 sandwiched between the inner barrel piece 112 and the outer barrel piece 113 is minimized. If there is excessive amount of the seal member 14 at this portion, then the outer barrel piece 113 may be hardly movable with respect to the inner barrel piece 112 during the winding, possibly causing hindrance to the crimping. However, in this embodiment, since the amount of the seal member 14 at this portion is suppressed, such hindrance by the seal member 14 during the crimping is suppressed.
  • the edges of the plurality of recesses 114 dig into the aluminum core wire W 11 . Also, at that time, strands of the aluminum core wire W 11 are separated and spread by the protrusion 115 located underneath the aluminum core wire W 11 , thus the number of strands contacting the barrel portion 11 is increased. The elongation of the seal member 14 progresses simultaneously.
  • the slight gap G 11 is formed between the second seal portion 142 and the first seal portion 141
  • the slight gap G 12 is formed between the third seal portion 143 and the first seal portion 141 .
  • FIG. 8 is a schematic view showing how the gap between the second seal portion and the first seal portion and the gap between the third seal portion and the first seal portion shown in FIG. 2 are closed by the elongation of the seal member during the crimping.
  • the second seal portion 142 is elongated in the intersecting direction D 12 which coincides with a length direction of the second seal portion 142 . Due to this elongation, the second seal portion 142 is connected to the first seal portion 141 , thereby closing the gap G 11 between them.
  • the first seal portion 141 is elongated in the axial direction D 11 which coincides with a length direction of the first seal portion 141 . Due to this elongation, the first seal portion 141 is connected to the third seal portion 143 , thereby closing the gap G 12 between them.
  • FIG. 9 is a side view of the electric wire with terminal shown in FIG. 6 viewed from a direction indicated with an arrow V 15 in FIG. 6
  • FIG. 10 is a cross sectional view taken along line V 14 -V 14 shown in FIG. 6 .
  • the space between the inner barrel piece 112 and the outer barrel piece 113 is sealed by the first seal portion 141 , and the opening 11 b of the barrel part 11 on the side of the terminal portion 12 is sealed by the second seal portion 142 . Furthermore, the space between the covered portion W 12 and the barrel portion 11 is sealed by the third seal portion 143 .
  • a dimension of the barrel portion 11 on the side of the terminal portion 12 (thereinafter called, “front end portion 118 ”) after the crimping (hereinafter called, “crimp height CH 11 ”), is set to be the following dimension. That is, the crimping is performed such that the crimp height CH 11 of this front end portion 118 is greater than a crimp height CH 12 of a crimp portion 119 of the aluminum core wire W 11 .
  • the second seal portion 142 of the seal member 14 located on the side of the terminal portion 12 is formed into a strip-like shape having a width designed to allow a part of the second seal portion 142 to be pushed out from the opening 11 b of the barrel portion 11 after the crimping, as described above.
  • a part of the seal member 14 projects from the opening 11 b of the front end portion 118 formed with the above-described crimp height CH 11 .
  • the crimp height CH 11 of the front end portion 118 is set to a dimension that makes the tubular barrel portion 11 crushed to the extent that such projection of the seal member 14 is formed.
  • the opening 11 b of the barrel portion 11 Due to the projection of the seal member 14 from the opening 11 b , the opening 11 b of the barrel portion 11 is sealed at a high level. Furthermore, also at the side of the barrel portion 11 at which the covered electric wire W 1 is extending out, a part of the seal member 14 projects out from between the covered portion W 12 and the barrel portion 11 , thereby sealing this portion at a high level. On the other hand, the space between the inner barrel piece 112 and the outer barrel piece 113 is sealed by the first seal portion 141 of minimum amount that is formed to have the width and the shape corresponding to the groove 116 . Consequently, the sealing at the respective portion of the barrel portion 11 can be performed while suppressing the hindrance to the crimping by the seal member 14 .
  • each portion of the seal member 14 is formed so as to project from the opening 11 b of the barrel portion 11 and from the side of the barrel portion 11 at which the covered electric wire W 1 extends out, it is possible to visually check that these portions are securely sealed with the seal member 14 after the crimping.
  • the crimp height CH 12 of the crimp portion 112 is relatively small as described above, the bonding with the aluminum core wire W 11 can be enhanced, thereby improving the reliability of contact with the crimp terminal 1 .
  • the crimping causes the edges of the respective recesses 114 provided on the inner surface 11 a of the barrel portion 11 to dig into the aluminum core wire W 11 , thereby providing good continuity between the covered electric wire W 1 and the crimp terminal 1 .
  • the seal member 14 is attached to the inner surface 11 a of the barrel portion 11 , the seal member 14 being configured to seal, after the crimping, the space between the inner barrel piece 112 and the outer barrel piece 113 , the opening 11 b of the barrel portion 11 , that is formed into a tubular shape, on the side of the terminal portion 12 , and the space between the covered portion W 12 and the barrel portion 11 .
  • the second seal portion 142 of the seal member 14 that is to be attached to the second region 11 a - 2 is formed into the strip-like shape having a width designed to allow a part of the second seal portion 142 to be pushed out from the opening 11 b after the crimping.
  • the first seal portion 141 that is to be attached to the first region 11 a - 1 is formed to have a width and a shape corresponding to the groove 116 .
  • the seal member 14 provides waterproof property with respect to the contact portion with the aluminum core wire W 11 throughout the entire circumference thereof.
  • waterproof property at the opening lib near the aluminum core wire W 11 has been improved by the second seal portion 142 that is formed into the strip-like shape having the width designed to allow a part thereof to be pushed out from the opening 11 b after the crimping. Furthermore, by forming the first seal portion 141 to have the width and the shape corresponding to those of the groove 116 in the first region 11 a - 1 , the amount of the first seal portion 141 can be minimized, thereby suppressing the hindrance by the seal member 14 during the crimping in which the winding and the crimping are performed with the inner barrel piece 112 arranged inside. Consequently, according to this embodiment, difficulty of manufacturing can be reduced while securely providing waterproof property with respect to the contact portion with the aluminum core wire W 11 .
  • the groove 116 is also provided to the third region 11 a - 3 so as to extend in the intersecting direction D 12 .
  • the groove 116 provided to the third region 11 a - 3 serves to prevent the displacement of the third seal portion 143 during the crimping, thereby further reducing difficulty of manufacturing.
  • the groove 116 is also provided to the second region 11 a - 2 so as to extend in the intersecting direction D 11 .
  • the groove 116 provided to this second region 11 a - 2 serves to prevent the displacement of the second seal portion 142 during the crimping. Consequently, according to this embodiment, the displacement during the crimping can be prevented for all of the attachment positions, thereby further reducing difficulty of manufacturing.
  • the grooves 116 are provided to extend in three rows in the axial direction D 11 .
  • the three rows of the grooves 116 are provided in the third region 11 a - 3 intersecting with the covered portion W 12 that is likely to move and likely to be applied with force during the crimping, for example, thereby further preventing displacement of the third seal portion 143 attached to this third region 11 a - 3 . Consequently, difficulty of manufacturing can be reduced even more.
  • the end portion W 1 a of the covered electric wire W 1 is placed onto the inner surface 11 a of the barrel portion 11 as follows. That is, the end portion W 1 a of the covered electric wire W 1 is placed such that the tip W 11 a of the aluminum core wire W 11 overlaps the second seal portion 142 of the seal member 14 located on a side of the terminal portion 12 . Consequently, a part that is located off, even if only slightly, from the second seal portion 142 in the axial direction D 1 can immediately contribute to electrical continuity with the aluminum core wire W 1 l .
  • the electrical conductivity between the aluminum core wire W 11 and the crimp terminal 1 is securely and sufficiently obtained. Consequently, according to the terminal connecting method of this embodiment, the electrical conductivity between the exposed aluminum core wire W 11 and the crimp terminal 1 can be securely and sufficiently obtained, while securely providing waterproof property with respect to the contact portion with the aluminum core wire W 11 .
  • the placing step (S 14 ) includes placing the end portion W 1 a on the inner surface 11 a of the barrel portion 11 such that the tip W 12 a of the covered portion W 12 overlaps the third seal portion 143 .
  • a part between the second seal portion 142 and the third seal portion 143 in the axial direction D 11 contributes to the electrical continuity with the aluminum core wire W 11 throughout substantially the entire length. Consequently, electrical conductivity between the exposed aluminum core wire W 11 and the crimp terminal 1 can be improved even more.
  • the first indent 117 a extending in the intersecting direction D 12 is provided at a location not overlapping with the seal member 14 and close to the third region 11 a - 3 , as shown in FIG. 2 . Furthermore, as shown in FIG. 5 , the barrel portion 11 is crimped to the end portion W 1 a of the covered electric wire W 1 such that the aluminum core wire W 11 contacts with the first indent 117 a.
  • the first indent 117 a extending in the intersecting direction D 12 functions to resist the return of the barrel portion 11 .
  • the seal member 14 made of flexible adhesive gel is wound around the end portion W 1 a in a manner overlapped with the first indent 117 a , it could behave as follows. That is, a part overlapped with the first indent 117 a may act as a cushion during the crimping and expand a winding diameter at the first indent 117 a , lowering the above-described function of the first indent 117 a.
  • the crimping is performed such that the aluminum core wire W 11 contacts with the first indent 117 a , thus the first indent 117 a is wound in a manner directly contacting with the aluminum core wire W 11 without the seal member 14 between the first indent 117 a and the aluminum core wire W 11 . Consequently, the first indent 117 a can resist the return of the barrel portion 11 without being affected by the seal member 14 . Also, since the first indent 117 a is wound without a cover of the covered electric wire W 1 between the first indent 117 a and the aluminum core wire W 11 , the winding diameter can be reduced further for the thickness of this cover.
  • the first indent 117 a can successfully resist the return of the barrel portion 11 .
  • the return of the barrel portion 11 can successfully be suppressed. Consequently, according to this embodiment, the return of the barrel portion 11 can be suppressed while securely providing the waterproof property with respect to the contact portion with the aluminum core wire W 11 .
  • the electrical conductivity between the aluminum core wire W 11 and the crimp terminal 1 can be securely and sufficiently obtained.
  • the inner surface 11 a of the barrel portion 11 is also provided with the second indent 117 b extending in the intersecting direction D 12 , at a location close to the terminal portion 12 . Consequently, the return of the barrel portion 11 can successfully be suppressed on both sides of the barrel portion 11 , i.e., on the side close to the terminal portion 12 and on the side opposite thereof.
  • the first indent 117 a and the second indent 117 b that are obtained by the sheet-metal processing are applied as the projections on the inner surface 11 a of the barrel portion 11 .
  • the indent is highly resistant to the return as described above, thus the return of the barrel portion 11 can be suppressed even more successfully.
  • the barrel portion 11 is configured to be crimped to the end portion W 1 a such that the tip W 12 a of the covered portion W 12 at the end portion W 1 a of the covered electric wire W 1 overlaps the third seal portion 143 .
  • the first indent 117 a is provided as close to the third region 11 a - 3 as possible.
  • the aluminum core wire W 11 is allowed to contact with the first indent 117 a that is positioned at such location, thereby effectively suppressing the return of the barrel portion 11 in the vicinity of the edge of the barrel portion 11 .
  • the end portion W 1 a is placed on the inner surface 11 a of the barrel portion 11 such that the aluminum core wire W 11 contacts with the first indent 117 a .
  • the first indent 117 a can successfully suppress the return of the barrel portion 11 without being affected by the seal member 14 . Consequently, according to the terminal connecting method of the this embodiment, the return of the barrel portion 11 can be suppressed, while securely providing waterproof property with respect to the contact portion with the aluminum core wire W 11 .
  • the placing step (S 14 ) includes placing the end portion W 1 a on the inner surface 11 a of the barrel portion 11 such that the tip W 12 a of the covered portion W 12 overlaps the third seal portion 143 . Consequently, the return of the barrel portion 11 can be effectively suppressed in the vicinity of the edge of the barrel portion 11 , as described above.
  • the placing step (S 14 ) includes placing the end portion W 1 a onto the inner surface 11 a of the barrel portion 11 such that the tip W 11 a of the aluminum core wire W 11 overlaps the second seal portion 142 . Consequently, the electrical conductivity between the aluminum core wire W 11 and the crimp terminal 1 can be sufficiently and securely obtained, as described above.
  • FIG. 11 shows a first modified example with respect to the embodiment shown in FIGS. 1-10 .
  • elements similar to those shown in FIGS. 1-10 are denoted by the same reference signs, and explanation of these similar elements is omitted. This is the same for explanation and the drawings to which reference is made for later-described other modified examples.
  • a crimp terminal 2 is crimped such that substantially the same crimp height CH 21 is obtained at a front end portion 211 and a crimp portion 212 of the aluminum core wire W 11 of a barrel portion 21 after the crimping. Furthermore, the second seal portion 142 of the seal member 14 is formed into a strip-like shape having a width designed to allow a part of the second seal portion 142 to be pushed out from the opening 11 b with this crimp height CH 21 .
  • the opening 11 b that requires relatively large amount for the sealing is sealed by the second seal portion 142 having the width as described above, while suppressing the hindrance to the crimping by the seal member 14 with the first seal portion 141 of minimum amount.
  • FIG. 12 shows a second modified example with respect to the embodiment shown in FIGS. 1-10 .
  • a state of placement of an end portion W 2 a of the covered electric wire W 2 onto the inner surface 11 a of the barrel portion 11 is different from the above-described embodiment. That is, in the second modified example, the end portion W 2 a of the covered electric wire W 2 is placed onto the inner surface 11 a of the barrel portion 11 such that a tip W 21 a of an aluminum core wire W 21 is arranged off from the second seal portion 142 toward a side opposite to the terminal portion 12 .
  • the end portion W 2 a of the covered electric wire W 2 is placed onto the inner surface 11 a of the barrel portion 11 such that a tip W 22 a of a covered portion W 22 is arranged off from the third seal portion 143 toward the terminal portion 12 .
  • the crimp terminal 1 is crimped to the covered electric wire W 2 such that the covered portion W 22 contacts the first indent 117 a.
  • the above-described embodiment can provide electrical continuity for longer range on the inner surface 11 a of the barrel portion 11 in the axial direction D 11 , thereby providing sufficient electrical conductivity, as described above.
  • the winding diameter can be reduced for the thickness of the cover, thereby successfully suppressing the return of the barrel portion 11 , as described above.
  • the second seal portion 142 is formed into a strip-like shape having a width designed to allow a part of the second seal portion 142 to be pushed out from the opening 11 b of the barrel portion 11 after the crimping, and the seal portion 141 is formed into a width and a shape corresponding to the groove 116 , as is the case with the above-described embodiment. Consequently, as with the above-described embodiment, in this second modified example also, difficulty of manufacturing can be reduced while securely providing waterproof property with respect to the contact portion with the aluminum core wire W 21 .
  • FIG. 13 shows a third modified example with respect to the embodiment shown in FIGS. 1-10 .
  • a crimp terminal 3 includes the third seal portion 143 of the seal member 14 that is arranged distant from an edge 31 b of a barrel portion 31 that intersects with the covered portion W 12 .
  • a placing step for placing the end portion W 1 a of the covered portion W 12 on an inner surface 31 a of the barrel portion 31 includes the following steps. That is, the placing step according to the third modified example includes placing the end portion W 1 a such that the covered portion W 12 directly contacts the inner surface 31 a of the barrel portion 31 between the seal member 14 and the edge 31 b of the barrel portion 31 .
  • the tip W 11 a of the aluminum core wire W 11 overlaps the second seal portion 142
  • the tip W 12 a of the covered portion W 12 overlaps the third seal portion 143
  • the exposed portion of the aluminum core wire W 11 contacts with the first indent 117 a
  • the second seal portion 142 is formed into a strip-like shape having a width designed to allow a part of the second seal portion 142 to be pushed out from the opening 11 b of the barrel portion 11 after the crimping
  • the seal portion 141 is formed into a width and a shape corresponding to the groove 116 , as is the case with the above-described embodiment.
  • a part between the third seal portion 143 of the seal member 14 and the edge 31 b of the barrel portion 31 is crimped while directly contacting with the covered portion W 12 . Consequently, fastening force of the barrel portion 31 with respect to the covered portion W 12 that is likely to move and likely to be applied with force in use and such can be improved.
  • FIG. 14 shows the fourth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 15 shows the fifth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 16 shows the sixth modified example with respect to the embodiment shown in FIGS. 1-10 .
  • the crimp terminal is shown with the seal member removed so that a groove according to each modified example can be seen easily.
  • a groove 416 a of a barrel portion 41 is provided in a first region 41 a - 1 and a third region 41 a - 3 of an inner surface 41 a , but is not provided in a second region 41 a - 2 .
  • a shape of the groove 416 a in the first region 41 a - 1 and the third region 41 a - 3 is the same as the groove 116 of the above-described embodiment.
  • a groove 416 b of the barrel portion 41 is provided in the first region 41 a - 1 and the second region 41 a - 2 of the inner surface 41 a , but is not provided in the third region 41 a - 3 except for an extending part from the first region 41 a - 1 .
  • a shape of the groove 416 b in the first region 41 a - 1 and the third region 41 a - 3 is the same as the groove 116 of the above-described embodiment.
  • a groove 416 c of the barrel portion 41 is provided in the first region 41 a - 1 of the inner surface 41 a , but is not provided in the second region 41 a - 2 . Furthermore, the groove 416 c is not provided in the third region 41 a - 3 except for an extending part from the first region 41 a - 1 .
  • a shape of the groove 416 c in the first region 41 a - 1 is the same as the groove 116 of the above-described embodiment.
  • the seal member 14 is attached, and then is bonded to the end portion W 1 a of the covered electric wire W 1 , as with the case of the above-described embodiment. Consequently, as with the above-described embodiment, difficulty of manufacturing can be reduced while securely providing waterproof property with respect to the contact portion with the aluminum core wire W 11 .
  • the electrical conductivity can be sufficiently and securely obtained, and also the return of the barrel portion 41 , 51 , 61 can be successfully suppressed, as with the above-described embodiment.
  • FIG. 17 shows the seventh modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 18 shows the eighth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 19 shows the ninth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 20 shows the tenth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 21 shows the eleventh modified example with respect to the embodiment shown in FIGS. 1-10 .
  • a second seal portion 542 a is divided from a first seal portion 541 a , while the third seal portion 543 a is connected to the first seal portion 541 a .
  • Shapes of the respective seal portions are substantially the same as the respective seal portions of the seal member 14 of the above-described embodiment.
  • the second seal portion 542 a is elongated in the intersecting direction D 12 that is coincident with a length direction thereof. Due to this elongation, the second seal portion 542 a is connected to the first seal portion 541 a , thereby closing the gap G 11 between them.
  • a third seal portion 543 b is divided from a first seal portion 541 b , while the second seal portion 542 b is connected to the first seal portion 541 b .
  • Shapes of the respective seal portions are substantially the same as the respective seal portions of the seal member 14 of the above-described embodiment.
  • the first seal portion 541 b is elongated in the axial direction D 11 that is coincident with a length direction thereof. Due to this elongation, the first seal portion 541 b is connected to the third seal portion 543 b , thereby closing the gap G 12 between them.
  • a third seal portion 543 c has a shape as described below. That is, this third seal portion 543 c is formed to have a width and a shape corresponding to the groove 116 in the third region 11 a - 3 shown in FIG. 2 . Specifically, the third seal portion 543 c is formed to have substantially the same width and the same shape as the groove 116 so the third seal portion 543 c can be received inside the groove. In addition, both of a second seal portion 542 c and the third seal portion 543 c are divided from a first seal portion 541 c .
  • Shapes of the first seal portion 541 c and the second seal portion 542 c are substantially the same as the seal member 14 of the above-described embodiment.
  • the second seal portion 542 c is elongated in the intersecting direction D 12 that is coincident with a length direction thereof. Due to this elongation, the second seal portion 542 c is connected to the first seal portion 541 c , thereby closing the gap G 11 between them.
  • the first seal portion 541 c is elongated in the axial direction D 11 that is coincident with a length direction thereof. Due to this elongation, the first seal portion 541 c is connected to the third seal portion 543 c , thereby closing the gap G 12 between them.
  • a seal member 54 d according to the tenth modified example shown in FIG. 20 is a further modified version of the seal member 54 c of the ninth modified example shown in FIG. 19 . That is, in the seal member 54 d according to the tenth modified example, a second seal portion 542 d is divided from a first seal portion 541 d , but the third seal portion 543 d is connected to the first seal portion 541 d . Meanwhile, shapes of the respective seal portions are substantially the same as the respective seal portions of the seal member 54 c of the ninth modified example.
  • the second seal portion 542 d is elongated in the intersecting direction D 12 that is coincident with a length direction thereof. Due to this elongation, the second seal portion 542 d is connected to the first seal portion 541 d , thereby closing the gap G 11 between them.
  • a seal member 54 e according to the eleventh modified example shown in FIG. 21 is also a further modified version of the seal member 54 c of the ninth modified example shown in FIG. 19 . That is, in the seal member 54 e according to the eleventh modified example, a third seal portion 543 e is divided from a first seal portion 541 e , but a second seal portion 542 e is connected to the first seal portion 541 e . Meanwhile, shapes of the respective seal portions are substantially the same as the respective seal portions of the seal member 54 c of the ninth modified example.
  • the first seal portion 541 e is elongated in the axial direction D 11 that is coincident with a length direction thereof. Due to this elongation, the first seal portion 541 e is connected to the third seal portion 543 e , thereby closing the gap G 12 between them.
  • the seal member 54 a , 54 b , 54 c , 54 d , 54 e is attached to the barrel portion 11 and bonded to the end portion W 1 a of the covered electric wire W 1 , as with the case of the above-described embodiment. Consequently, as with the above-described embodiment, difficulty of manufacturing can be reduced while securely providing waterproof property with respect to the contact portion with the aluminum core wire W 11 . In addition, the electrical conductivity can be sufficiently and securely obtained, and also the return of the barrel portion 11 can be successfully suppressed, as with the above-described embodiment.
  • the ninth through eleventh modified examples in which the third seal portion 543 c , 543 d , 543 e is formed into a width and a shape corresponding to the groove 116 in the third region 11 a - 3 have the following additional advantages. According to the ninth through eleventh modified examples, amount of the third seal portion 543 c , 543 d , 543 e can also be minimized. Consequently, the sealing of the respective portions of the barrel portion 11 is performed while further suppressing the hindrance to the crimping by the seal member 54 c , 54 d , 54 e , thereby further reducing difficulty of manufacturing.
  • FIG. 22 shows the twelfth modification with respect to the embodiment shown in FIGS. 1-10
  • FIG. 23 shows the thirteenth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 24 shows the fourteenth modified example with respect to the embodiment shown in FIGS. 1-10 .
  • a recess 614 a according to the twelfth modified example shown in FIG. 22 is formed into an oval shape in a plan view.
  • a recess 614 b according to the thirteenth modified example shown in FIG. 20 is formed into a parallelogram in a plan view.
  • a recess 614 c according to the fourteenth modified example shown in FIG. 21 is formed into a hexagonal shape in a plan view.
  • modified examples of the recess 114 of the crimp terminal 1 of the above-described embodiment may include, for example, those formed into a triangular shape or other polygonal shapes in a plan view. Any of these modified examples is highly resistant to a force to expand in an in-plane direction of the inner surface 11 a , compared to the linear groove extending in the intersecting direction D 12 that is conventionally employed as a serration, for example.
  • FIG. 25 shows the fifteenth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 26 shows the sixteenth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 27 shows the seventeenth modified example with respect to the embodiment shown in FIGS. 1-10
  • FIG. 28 shows then eighteenth modified example with respect to the embodiment shown in FIGS. 1-10 .
  • a first seal portion 741 a is a portion extending in a strip-like shape in the axial direction D 11 in the first region 11 a - 1 .
  • a second seal portion 742 a is a portion extending in a strip-like shape in the intersecting direction D 12 in the second region 11 a - 2 .
  • a third seal portion 743 a is a portion extending in a strip-like shape in the intersecting direction D 12 in the third region 11 a - 3 . Both of the second seal portion 742 a and the third seal portion 743 a are divided from the first seal portion 741 a .
  • each of the second seal portion 742 a and the third seal portion 743 a is divided from the first seal portion 741 a with a gap G 71 a traversing the path 11 a - 4 shown in FIG. 2 in the intersecting direction D 12 .
  • the first seal portion 741 a , the second seal portion 742 a and the third seal portion 743 a are attached to the barrel portion 11 so as to overlap with the groove 116 .
  • the first seal portion 741 a is elongated in the axial direction D 11 that is coincident with a length direction thereof. Due to this elongation, the first seal portion 741 a is connected to both of the second seal portion 742 a and the third seal portion 743 a , thereby closing the gap G 71 a between them.
  • a seal member 74 b according to the sixteenth modified example shown in FIG. 26 is a further modified version of the seal member 74 a of the fifteenth modified example shown in FIG. 25 . That is, in the seal member 74 b according to the sixteenth modified example, a second seal portion 742 b is divided from a first seal portion 741 b , but a third seal portion 743 b is connected to the first seal portion 741 b . In addition, in this sixteenth modified example, the second seal portion 742 b is divided from the first seal portion 741 b with a gap G 71 b traversing the above-described path 11 a - 4 in the axial direction D 11 .
  • the second seal portion 742 b is elongated in the intersecting direction D 12 that is coincident with a length direction thereof. Due to this elongation, the second seal portion 742 b is connected to the first seal portion 741 b , thereby closing the gap G 71 b between them.
  • a seal member 74 c according to the seventeenth modified example shown in FIG. 27 is also a further modified version of the seal member 74 a of the fifteenth modified example shown in FIG. 25 . That is, in the seal member 74 c according to the seventeenth modified example, a second seal portion 742 c is divided from a first seal portion 741 c , but a third seal portion 743 c is connected to the first seal portion 741 c . In addition, in this seventeenth modified example, the second seal portion 742 c is divided from the first seal portion 741 c with a gap G 71 c traversing the above-described path 11 a - 4 in the intersecting direction D 12 .
  • the first seal portion 741 c is elongated in the axial direction D 11 . Due to this elongation, the first seal portion 741 c is connected to the second seal portion 742 c , thereby closing the gap G 71 c between them.
  • a seal member 74 d according to the eighteenth modified example shown in FIG. 28 is also a further modified version of the seal member 74 a of the fifteenth modified example shown in FIG. 25 . That is, in the seal member 74 d according to the eighteenth modified example, a third seal portion 743 d is divided from a first seal portion 741 d , but a second seal portion 742 d is connected to the first seal portion 741 d . In addition, in this eighteenth modified example, the third seal portion 743 d is divided from the first seal portion 741 d with a gap G 71 d traversing the above-described path 11 a - 4 in the axial direction D 11 .
  • the third seal portion 743 d is elongated in the intersecting direction D 12 . Due to this elongation, the third seal portion 743 d is connected to the first seal portion 741 d , thereby closing the gap G 71 d between them.
  • the first seal portion 141 is formed into the width and the shape corresponding to the groove 116 , and thus the amount of the first seal portion 141 is reduced, so difficulty of manufacturing can be reduced more, as described above.
  • these fifteenth through eighteenth modified examples when they are crimped to the covered electric wire W 1 as shown for example in FIG. 5 , can also provide sufficient electrical conductivity and can successfully suppress the return of the barrel portion 31 , as with the above-described embodiment.
  • the above-described embodiment and various modified examples exemplary show the barrel portion provided with the protrusion formed by applying pressing from the outer surface side.
  • the barrel portion is not limited to this, and this protrusion may be omitted.
  • the strands of the aluminum core wire can be separated and spread thereby the number of strands contacting the barrel portion can be increased.
  • the above-described embodiment and various modified examples exemplary show the crimp terminal provided with the terminal portion 12 as a quadrangular tube-like female terminal, as one example of the terminal portion.
  • the terminal portion is not limited to this, and may have other shapes and may involve other connection forms.

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JP7305265B2 (ja) * 2019-06-25 2023-07-10 矢崎総業株式会社 端子付き電線
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US11264735B1 (en) * 2020-08-28 2022-03-01 TE Connectivity Services Gmbh Electrical terminal for terminating a wide size range of magnet wires
US20220069482A1 (en) * 2020-08-28 2022-03-03 TE Connectivity Services Gmbh Electrical terminal for terminating a wide size range of magnet wires

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CN109983626A (zh) 2019-07-05
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JP6886814B2 (ja) 2021-06-16
CN109983626B (zh) 2020-09-15

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